Level shift circuit

A level shift circuit comprising:

• a level shift transistor of a first conductivity type configured to level shift a signal from a primary side circuit to a secondary side circuit between the primary side circuit having a primary side reference potential as reference and the secondary side circuit having a secondary side reference potential independent from the primary side reference potential as reference;
• a diode connected in a forward direction between a first main electrode of the level shift transistor and the secondary side circuit;
• a capacitor connected in parallel to the diode;
• a first transistor of a second conductivity type connected between a control electrode of the level shift transistor and a second main electrode;
• a current mirror circuit in which a primary side is connected to the second main electrode of the level shift transistor and a secondary side is connected between a primary side power supply of the primary side circuit and the primary side reference potential via a second transistor of the second conductivity type;
• a third transistor of the first conductivity type connected between the secondary side of the current mirror and the primary side reference potential;
• a first inverter configured to invert the signal;
• and
• a second inverter configured to invert output of the first inverter, wherein
• the control electrode of the level shift transistor is connected to the primary side power supply,
• a control electrode of the first transistor is connected to an output of the second inverter,
• a control electrode of each of the second transistor and the third transistor is connected to an output of the first inverter, and
• the diode is connected to a secondary power supply of the secondary side circuit via a resistance element.